package oss;

/**
 * @Author zhangtao
 * @create 2022/3/9 20:27
 */

import io.minio.*;
import io.minio.messages.DeleteError;
import io.minio.messages.DeleteObject;
import io.minio.messages.Item;

import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

/**
 * @description： minio工具类
 * @version：3.0
 */
public class MinioUtil {
    private MinioClient minioClient;

    private String bucketName;


    public MinioUtil() {
        minioClient =
                MinioClient.builder()
                        .endpoint("https://play.min.io")
                        .credentials("Q3AM3UQ867SPQQA43P2F", "zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG")
                        .build();
    }

    /**
     * description: 判断bucket是否存在，不存在则创建
     *
     * @return: void
     */
    public void existBucket(String name) {
        try {
            boolean exists = minioClient.bucketExists(BucketExistsArgs.builder().bucket(name).build());
            if (!exists) {
                minioClient.makeBucket(MakeBucketArgs.builder().bucket(name).build());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 创建存储bucket
     *
     * @param bucketName 存储bucket名称
     * @return Boolean
     */
    public Boolean makeBucket(String bucketName) {
        try {
            minioClient.makeBucket(MakeBucketArgs.builder()
                    .bucket(bucketName)
                    .build());
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }

    /**
     * 删除存储bucket
     *
     * @param bucketName 存储bucket名称
     * @return Boolean
     */
    public Boolean removeBucket(String bucketName) {
        try {
            minioClient.removeBucket(RemoveBucketArgs.builder()
                    .bucket(bucketName)
                    .build());
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }

    /**
     * description: 上传文件
     *
     * @param multipartFile
     * @return: java.lang.String
     */
//    public List<String> upload(MultipartFile[] multipartFile) {
//        List<String> names = new ArrayList<>(multipartFile.length);
//        for (MultipartFile file : multipartFile) {
//            String fileName = file.getOriginalFilename();
//            String[] split = fileName.split("\\.");
//            if (split.length > 1) {
//                fileName = split[0] + "_" + System.currentTimeMillis() + "." + split[1];
//            } else {
//                fileName = fileName + System.currentTimeMillis();
//            }
//            InputStream in = null;
//            try {
//                in = file.getInputStream();
//                minioClient.putObject(PutObjectArgs.builder()
//                        .bucket(bucketName)
//                        .object(fileName)
//                        .stream(in, in.available(), -1)
//                        .contentType(file.getContentType())
//                        .build()
//                );
//            } catch (Exception e) {
//                e.printStackTrace();
//            } finally {
//                if (in != null) {
//                    try {
//                        in.close();
//                    } catch (IOException e) {
//                        e.printStackTrace();
//                    }
//                }
//            }
//            names.add(fileName);
//        }
//        return names;
//    }

    /**
     * description: 下载文件
     *
     * @param fileName
     * @return: org.springframework.http.ResponseEntity<byte [ ]>
     */
//    public ResponseEntity<byte[]> download(String fileName) {
//        ResponseEntity<byte[]> responseEntity = null;
//        InputStream in = null;
//        ByteArrayOutputStream out = null;
//        try {
//            in = minioClient.getObject(GetObjectArgs.builder().bucket(bucketName).object(fileName).build());
//            out = new ByteArrayOutputStream();
//            IOUtils.copy(in, out);
//            //封装返回值
//            byte[] bytes = out.toByteArray();
//            HttpHeaders headers = new HttpHeaders();
//            try {
//                headers.add("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
//            } catch (UnsupportedEncodingException e) {
//                e.printStackTrace();
//            }
//            headers.setContentLength(bytes.length);
//            headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
//            headers.setAccessControlExposeHeaders(Arrays.asList("*"));
//            responseEntity = new ResponseEntity<byte[]>(bytes, headers, HttpStatus.OK);
//        } catch (Exception e) {
//            e.printStackTrace();
//        } finally {
//            try {
//                if (in != null) {
//                    try {
//                        in.close();
//                    } catch (IOException e) {
//                        e.printStackTrace();
//                    }
//                }
//                if (out != null) {
//                    out.close();
//                }
//            } catch (IOException e) {
//                e.printStackTrace();
//            }
//        }
//        return responseEntity;
//    }

    /**
     * 查看文件对象
     *
     * @param bucketName 存储bucket名称
     * @return 存储bucket内文件对象信息
     */
    public List<ObjectItem> listObjects(String bucketName) {
        Iterable<Result<Item>> results = minioClient.listObjects(
                ListObjectsArgs.builder().bucket(bucketName).build());
        List<ObjectItem> objectItems = new ArrayList<>();
        try {
            for (Result<Item> result : results) {
                Item item = result.get();
                ObjectItem objectItem = new ObjectItem();
                objectItem.setObjectName(item.objectName());
                objectItem.setSize(item.size());
                objectItems.add(objectItem);
            }
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
        return objectItems;
    }

    /**
     * 批量删除文件对象
     *
     * @param bucketName 存储bucket名称
     * @param objects    对象名称集合
     */
    public Iterable<Result<DeleteError>> removeObjects(String bucketName, List<String> objects) {
        List<DeleteObject> dos = objects.stream().map(e -> new DeleteObject(e)).collect(Collectors.toList());
        Iterable<Result<DeleteError>> results = minioClient.removeObjects(RemoveObjectsArgs.builder().bucket(bucketName).objects(dos).build());
        return results;
    }
}


